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* doc: grammatical updates to libxt_SETJan Engelhardt2012-07-311-6/+6
| | | | | | Cherry-picked these from recent patches from Mr Dash Four. Signed-off-by: Jan Engelhardt <jengelh@inai.de>
* iptables-restore: warn about -t in rule linesJan Engelhardt2012-07-312-4/+8
| | | | | | | save-restore syntax uses *table, not -t table. Signed-off-by: Jan Engelhardt <jengelh@inai.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* bump version to 1.4.15v1.4.15Pablo Neira Ayuso2012-07-311-1/+1
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_recent: add --mask netmaskDenys Fedoryshchenko2012-07-313-21/+171
| | | | | | | | | | This new option will be available in the Linux kernel 3.5 [ Pablo fixed coding-style issues and cleaned up this. Added manpages as well ] Signed-off-by: Denys Fedoryshchenko <denys@visp.net.lb> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* iptables-restore: fix parameter parsing (shows up with gcc-4.7)Pablo Neira Ayuso2012-07-302-4/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch fixes parameter parsing in iptables-restore since time ago. The problem has shown up with gcc-4.7. This version of gcc seem to perform more agressive memory management than previous. Peter Lekensteyn provided the following sample code similar to the one in iptables-restore: int i = 0; for (;;) { char x[5]; x[i] = '0' + i; if (++i == 4) { x[i] = '\0'; /* terminate string with null byte */ printf("%s\n", x); break; } } Many may expect 0123 as output. But GCC 4.7 does not do that when compiling with optimization enabled (-O1 and higher). It instead puts random data in the first bytes of the character array, which becomes: | 0 | 1 | 2 | 3 | 4 | | RANDOM | '3' | '\0' | Since the array is declared inside the scope of loop's body, you can think of it as of a new array being allocated in the automatic storage area for each loop iteration. The correct code should be: char x[5]; for (;;) { x[i] = '0' + i; if (++i == 4) { x[i] = '\0'; /* terminate string with null byte */ printf("%s\n", x); break; } } Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Revert "iptables-restore: move code to add_param_to_argv, cleanup (fix gcc-4.7)"Pablo Neira Ayuso2012-07-302-130/+136
| | | | | | | | This reverts commit 44191bdbd71e685fba9eab864b9df25e63905220. Apply instead a patch that really clarifies the bug in iptables-restore. This should be good for the record (specifically, for distributors so they can find the fix by googling).
* iptables-restore: move code to add_param_to_argv, cleanup (fix gcc-4.7)Pablo Neira Ayuso2012-07-252-136/+130
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | This patch seems to be a mere cleanup that moves the parameter parsing code to add_param_to_argv. But, in reality, it also fixes iptables when compiled with gcc-4.7. Moving param_buffer declaration out of the loop seems to resolve the issue. gcc-4.7 seems to be generating bad code regarding param_buffer. @@ -380,9 +380,9 @@ quote_open = 0; escaped = 0; param_len = 0; + char param_buffer[1024]; for (curchar = parsestart; *curchar; curchar++) { - char param_buffer[1024]; if (quote_open) { if (escaped) { But I have hard time to apply this patch in such a way. Instead, I came up with the idea of this cleanup, which does not harm after all (and fixes the issue for us). Someone in: https://bugzilla.redhat.com/show_bug.cgi?id=82579 put some light on this: "Yes, I ran into this too. The issue is that the gcc optimizer is optimizing out the code that collects quoted strings in iptables-restore.c at line 396. If inside a quotemark and it hasn't seen another one yet, it executes param_buffer[param_len++] = *curchar; continue; At -O1 or higher, the write to param_buffer[] never happens. It just increments param_len and continues. Moving the definition of char param_buffer[1024]; outside the loop fixes it. Why, I'm not sure. Defining the param_buffer[] inside the loop should simply restrict its scope to inside the loop." Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_HMARK: correct a number of errors introduced by Pablo's reworkHans Schillstrom2012-07-171-19/+26
| | | | | | | | | | | * Fix typo in --hmark-rnd description. * Remove trailing -set from port and spi options. * Take missing value for ports and spi from command line. * Fix spi / port validation. * Remove --hmark-offset as mandatory. Signed-off-by: Hans Schillstrom <hans@schillstrom.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_HMARK: fix ct case examplePablo Neira Ayuso2012-07-161-2/+2
| | | | | | | | | ... -j HMARK --hmark-tuple ct,src,dst --hmark-offset 10000 ... Note `ct' requires also the tuples. Reported-by: Hans Schillstrom <hans@schillstrom.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_HMARK: fix output of iptables -LHans Schillstrom2012-07-161-8/+8
| | | | | | | | | Fix accidental swap of [s|d]port-mask and [s|d]port-port. Use xtables_ipmask_to_cidr instead of xtables_ipmask_to_numeric. Signed-off-by: Hans Schillstrom <hans@schillstrom.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_hashlimit: add support for byte-based operationFlorian Westphal2012-07-144-16/+183
| | | | | | | | | | | | | | allows --hashlimit-(upto|above) Xb/s [ --hashlimit-burst Yb ] to make hashlimit match when X bytes/second are exceeded; optionally, Y bytes will not be matched (i.e. bursted). [ Pablo fixed minor compilation warning in this patch with gcc-4.6 and x86_64 ] libxt_hashlimit.c: In function ‘parse_bytes’: libxt_hashlimit.c:216:6: warning: format ‘%llu’ expects argument of type ‘long long unsigned int’, but argument 3 has type ‘uint64_t’ [-Wformat] Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_recent: remove unused variableEldad Zack2012-07-141-2/+0
| | | | | | | The info variable is assigned but never read in recent_check(). Signed-off-by: Eldad Zack <eldad@fogrefinery.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* extensions: add HMARK targetHans Schillstrom2012-07-143-0/+553
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | The target allows you to set mark packets based Jenkins' hash calculation: h(t, rnd) = x mark = (x % mod) + offset where: * t is a tuple that is used for the hashing: t = [ src, dst, proto, sport, dport ] Note that you can customize the tuple, thus, removing some component that you don't want to use for the calculation. You can also use spi instead of sport and dport, btw. * rnd is the random seed that is explicitly passed via --hmark-rnd * mod is the modulus, to determine the range of possible marks * offset determines where the mark starts from This target only works for the "raw" and "mangle" tables. This can be used to distribute flows between a cluster of systems and uplinks. Initially based on work from Hans Schillingstrom. Pablo took it over and introduced several improvements. Signed-off-by: Hans Schillstrom <hans.schillstrom@ericsson.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxtables: add xtables_ip[6]mask_to_cidrPablo Neira Ayuso2012-07-143-11/+28
| | | | | | | | | | | | | | This patch adds generic functions to return the mask in CIDR notation whenever is possible. This patch also simplifies xtables_ip[6]mask_to_numeric, that now use these new two functions. This patch also bumps libxtables_vcurrent and libxtables_vage since we added a couple new interfaces (thanks to Jan Engelhardt for his little reminder on this). Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_devgroup: add man page snippetFlorian Westphal2012-07-041-0/+7
| | | | Signed-off-by: Florian Westphal <fw@strlen.de>
* Bump version to 1.4.14v1.4.14Pablo Neira Ayuso2012-05-261-1/+1
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* tests: add rateest match rulesFlorian Westphal2012-05-231-16/+12
| | | | | | | also, -p mobility gets us EINVAL from kernel, use -p ipv6-mh instead. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* extensions: libxt_rateest: output all options in save hookFlorian Westphal2012-05-221-21/+34
| | | | | | | | | | | | | | ipt-restore fails to parse the ipt-save output: zmatches -m rateest --rateest RE1 --rateest-pps --rateest-lt 5 (should be "--rateest-pps 5 --rateest-lt"). Also, the "delta" option was never shown in -save output, but twice in some cases when using "iptables -L". Also, the "b/pps1" option must be shown when "delta" option is used with relative mode. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* ip(6)tables-restore: make sure argv is NULL terminatedFlorian Westphal2012-05-142-2/+2
| | | | | | | | | | Else, argv[argc] may point to free'd memory. Some extensions, e.g. rateest, may fail to parse valid input because argv[optind] (with optind == argc) is not NULL. Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libipt_ULOG: fix --ulog-cprangePablo Neira Ayuso2012-05-091-2/+2
| | | | | | | | | | | In 1f2474a libipt_ULOG: use guided option parser. A bug has been accidentally introduced in --ulog-cprange, limiting possible values from 1 to 50. However, that limit should be applied to --ulog-qthreshold. Reported-by: Gaurav Sinha <vgsinha@gmail.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libiptc: fix retry path in TC_INITMiguel GAIO2012-04-191-1/+1
| | | | | | | | | | | There is an issue on TC_INIT retry path: In error case, TC_FREE is called and close sockfd. The retry does not reopen then always fail. The proposing patch reopens sockfd in retry patch. Signed-off-by: Miguel GAIO <miguel.gaio@efixo.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* libxt_CT: add --timeout optionPablo Neira Ayuso2012-04-023-12/+139
| | | | | | | | | | | | | | | | | | | | This patch adds the --timeout option to allow to attach timeout policy objects to flows, eg. iptables -I PREROUTING -t raw -s 1.1.1.1 -p tcp \ -j CT --timeout custom-tcp-policy You need the nfct(8) tool which is available at: http://git.netfilter.org/cgi-bin/gitweb.cgi?p=nfct.git To define the cttimeout policies. Example of usage: nfct timeout add custom-tcp-policy inet tcp established 1000 The new nfct tool also requires libnetfilter_cttimeout: http://git.netfilter.org/cgi-bin/gitweb.cgi?p=libnetfilter_cttimeout.git Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Bump version to 1.4.13v1.4.13Pablo Neira Ayuso2012-03-271-1/+1
| | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* extensions: add nfacct matchPablo Neira Ayuso2012-03-273-0/+136
| | | | | | | | | | | | | | This patch provides the user-space iptables support for the nfacct match. This can be used as it follows: nfacct add http-traffic iptables -I INPUT -p tcp --sport 80 -m nfacct --nfacct-name http-traffic iptables -I OUTPUT -p tcp --dport 80 -m nfacct --nfacct-name http-traffic nfacct get http-traffic See also man nfacct(8) for more information. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* src: mark newly opened fds as FD_CLOEXEC (close on exec)Maciej Żenczykowski2012-03-232-0/+15
| | | | | | | | | | | | | | | | | | By default, Unix-like systems leak file descriptors after fork/exec call. I think this seem to result in SELinux spotting a strange AVC log messages according to what I can find on the web. Fedora 18 iptables source includes this change. Maciej says: "iptables does potentially fork/exec modprobe to load modules. That can cause a selinux 'domain'/'role'/whatever-it-is-called crossing. You can do automated inspection of what gets carried across such privilege changes and any unexpected open file descriptors flag problems, patches like this cut down on the noise." Signed-off-by: Maciej enczykowski <maze@google.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* iptables: missing free() in function delete_entry()Franz Flasch2012-03-121-1/+3
| | | | | | | | Fixed a memory leak in the dry run path of function delete_entry(). Signed-off-by: Franz Flasch <franz.flasch@frequentis.com> Signed-off-by: Christian Engelmayer <christian.engelmayer@frequentis.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* iptables: missing free() in function cache_add_entry()Franz Flasch2012-03-121-0/+1
| | | | | | | | Fixed a memory leak in the error path of function cache_add_entry(). Signed-off-by: Franz Flasch <franz.flasch@frequentis.com> Signed-off-by: Christian Engelmayer <christian.engelmayer@frequentis.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Revert "libiptc: Returns the position the entry was inserted"Pablo Neira Ayuso2012-03-012-5/+3
| | | | | | | | | This reverts commit d65702c5c5bbab0ef12298386fa4098c72584e6c. This is breaking my iptables scripts: iptables -A INPUT -m state --state RELATED,ESTABLISHED -j ACCEPT iptables: Incompatible with this kernel.
* libiptc: Returns the position the entry was insertedJonh Wendell2012-02-292-3/+5
| | | | Jan Engelhardt showed no objections to this patch.
* extensions: add IPv6 capable ECN match extensionPatrick McHardy2012-02-234-67/+66
| | | | | | | Patrick submitted this patch by 9th Jun 2011, I'm recovering and applying it to iptables. Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* extensions: add rpfilter moduleFlorian Westphal2012-02-233-0/+151
| | | | | Signed-off-by: Florian Westphal <fw@strlen.de> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* Merge branch 'stable'Pablo Neira Ayuso2012-01-021-1/+1
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| * Bump version to 1.4.12.2v1.4.12.2Pablo Neira Ayuso2012-01-021-1/+1
| | | | | | | | Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
* | extensions: link on libxtables and check symbolsJan Engelhardt2011-12-312-11/+13
| | | | | | | | | | | | | | | | | | | | | | | | | | Have each extension link against libxtables.so; with this, all home symbols are known at link time and we can use ld's --no-undefined to run the check, dropping the homebrew solution. By having libxtables.so required by extensions, package managers' automatic dependency discovery will become effective so that manual dependencies for distros with split extension packages (e.g. OpenWRT) will not be necessary anymore. Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
* | build: use delayed expansion on the user-settable variablesJan Engelhardt2011-12-311-21/+21
| | | | | | | | Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
* | Update .gitignoreJan Engelhardt2011-12-312-9/+9
| | | | | | | | Split off extensions/.gitignore.
* | build: use AC_CONFIG_AUX_DIR and stash away toolsJan Engelhardt2011-12-312-10/+3
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* | Update .gitignoreJan Engelhardt2011-12-311-3/+3
| | | | | | | | Only ignore these paths if they are a directory.
* | Merge branch 'stable'Jan Engelhardt2011-12-311-1/+2
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| * nfnl_osf: add missing libnfnetlink_CFLAGS to compile processJan Engelhardt2011-12-311-1/+2
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* | Merge branch 'stable'Pablo Neira Ayuso2011-12-231-17/+25
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| * libxt_connbytes: fix handling of --connbytes FROMFlorian Westphal2011-12-231-17/+25
| | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | | quoting man page: match packets from a connection whose packets/bytes/average packet size is more than FROM and less than TO bytes/packets. if TO is omitted only FROM check is done. But, when TO was omitted, we did treat it like "x:x" which is not the same at all. Before commit 09631dc60ce41bc484a42fcf4d4ddf7036820bd1 (libxt_connbytes: use guided option parser), we failed to parse "--connbytes x" ('Bad range "x"'), but treated "x:" like "x:0xffffffff". Also, restore the "from must be smaller than to" check. Signed-off-by: Florian Westphal <fw@strlen.de>
* | Merge branch 'stable'Jan Engelhardt2011-12-1867-818/+1038
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| * libxt_recent: Add support for --reap optionTim Gardner2011-12-092-1/+21
| | | | | | | | | | | | | | | | Support for the reap option was merged in the kernel as of 2.6.35. Cc: Pablo Neira Ayuso <pablo@netfilter.org> Cc: Jan Engelhardt <jengelh@medozas.de> Signed-off-by: Tim Gardner <tim.gardner@canonical.com>
| * Merge branch 'stable'Pablo Neira Ayuso2011-11-012-1/+3
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| * \ Merge branch 'stable'Pablo Neira Ayuso2011-09-281-0/+1
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| * | | Improve readability of bitwise operationThomas Jarosch2011-09-281-2/+2
| | | | | | | | | | | | | | | | | | | | | | | | | | | | CLUSTERIP: improve readability of bitwise operation Signed-off-by: Thomas Jarosch <thomas.jarosch@intra2net.com> Signed-off-by: Pablo Neira Ayuso <pablo@netfilter.org>
| * | | Merge branch 'stable'Jan Engelhardt2011-09-197-23/+30
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| * | | | ip6tables-restore: make code look alike with iptables-restoreJan Engelhardt2011-09-112-33/+30
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
| * | | | libiptc: use a family-invariant xtc_ops struct for code reductionJan Engelhardt2011-09-117-2/+33
| | | | | | | | | | | | | | | | | | | | Signed-off-by: Jan Engelhardt <jengelh@medozas.de>
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